Notice USN-8842-1, published on September 29, 2026 in the Ubuntu Security feed, reports several Linux kernel issues that could possibly be exploited to compromise a system. The stated update addresses flaws in InfiniBand and network drivers, the TCM subsystem, the B.A.T.M.A.N., HSR and RDS protocols, IPv4 and IPv6 networking, and Netfilter.
The text lists CVE-2026-53131, CVE-2026-53186, CVE-2026-53216, CVE-2026-53221, CVE-2026-53355, CVE-2026-63886, CVE-2026-63887, CVE-2026-63888, CVE-2026-63912, CVE-2026-63922, CVE-2026-63924, CVE-2026-63984, CVE-2026-63992, CVE-2026-63993, CVE-2026-63994, CVE-2026-64000, CVE-2026-64007 and CVE-2026-64091. The supplied text is an automated translation. To confirm the scope and consult guidance for your distribution, check the original USN-8842-1 notice through Ubuntu's official security channels.